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Absence is not evidence: the seat wallet trusts only verdicts

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The games-list reply pruned any wallet seat the server did not vouch
for — so one poll against a restarting (or wrong) server silently
deleted live credentials, the second seat-burning path this session's
server-squatting exposed. myGames now returns explicit verdicts:
a seat is voided only when its room EXISTS and refused that exact
token. Absent rooms earn no verdict and absent seats survive; the
wallet caps by age at fifty instead of by trust.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RCWSTnb1KYTPyL4GmhGnF
This commit is contained in:
Eric Wagoner
2026-08-26 14:03:29 -04:00
co-authored by Claude Fable 5
parent 72148dd7c2
commit 3d2bf17585
2 changed files with 23 additions and 15 deletions
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packages/web/src/net.svelte.ts
+12 -12
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@@ -491,18 +491,18 @@ class Net {
if (g.yourTurn && !was) this.notifyTurn(g);
this.lastYourTurn.set(key, g.yourTurn);
}
// A seat the server answered for but did not list is gone — the
// room was deleted (or the seat's token voided). Quietly drop it
// from the ledger rather than showing "unreachable" forever.
// (The server checks at most MAX_MYGAMES_SEATS = 50 per ask;
// never prune blind past that cap.)
if (this.seats.length <= 50) {
const listed = new Set((msg.games as GameSummary[]).map((g) => `${g.roomId}:${g.name}`));
const kept = this.seats.filter((s) => listed.has(`${s.roomId}:${s.name}`));
if (kept.length !== this.seats.length) {
this.seats = kept;
saveSeats(this.seats);
}
// Prune ONLY seats the server proved dead: the room exists and
// refused this exact token. A seat merely ABSENT from the reply
// stays — a restarting server, a stale restore, or the wrong
// backend all answer with ignorance, and treating ignorance as
// deletion once cost a live player his seat mid-game. The
// wallet is capped by age instead of by trust.
const voided = new Set((msg.voided as string[] | undefined) ?? []);
let kept = this.seats.filter((s) => !voided.has(`${s.roomId}:${s.name}`));
if (kept.length > 50) kept = kept.slice(kept.length - 50);
if (kept.length !== this.seats.length) {
this.seats = kept;
saveSeats(this.seats);
}
break;
}